A buffer system, used as an ingredient for a certain diet soft drink, is prepared by combining 2.00 L of a 0.250 M citric acid solution and 4.00 L of a 0.800 M sodium citrate salt solution.

Citric acid has a K_a value of 7.40 x 10^-4. What is the pH of the buffer solution?

Provide your answer to 2 decimal places.

ʼn Buffersisteem, wat as bestanddeel vir 'n sekere dieetkoeldrank gebruik word, word voorberei deur 2.00 L van 'n 0.250 M sitroensuuroplossing en 4.00 L van 'n 0.800 M natriumsitraat soutoplossing te kombineer.

Sitroensuur het ʼn K_a waarde van 7.40 x 10^-4. Wat is die pH van die bufferoplossing?

Gee jou antwoord tot 2 desimale syfers.